Sending and receiving method and system for CBTC (Communications-Based Train Control) data with distributed fountain codes

A fountain code, distributed technology, applied in the field of data communication, can solve problems such as low equipment utilization rate and CBTC handover interruption, and achieve the effect of reducing system cost, eliminating interruption and delay, and eliminating communication interruption.

Active Publication Date: 2013-11-13
BEIJING JIAODA MICROUNION TECH
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Problems solved by technology

[0016] The technical problem to be solved by the present invention is: how to solve the existing CBTC handover interruption, the need for redundant systems, the low utilization rate of equipment in the CBTC data transmission system, and the need for at least one complete data in the decoding process

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  • Sending and receiving method and system for CBTC (Communications-Based Train Control) data with distributed fountain codes
  • Sending and receiving method and system for CBTC (Communications-Based Train Control) data with distributed fountain codes
  • Sending and receiving method and system for CBTC (Communications-Based Train Control) data with distributed fountain codes

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[0057] refer to Figure 1-11 Examples of the present invention will be described.

[0058] In order to make the above objects, features and advantages more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0059] image 3 It is a schematic diagram of CBTC handover. The figure includes three plots Z 1 ,Z 2 ,Z 3 . In the traditional way, the train passes through this section from bottom to top, and the antennas at the front and rear of the train perform two handovers respectively. Each switching requires the conversion of the master device and the backup device, a total of four times. Using distributed fountain code CBTC vehicle-ground data transmission, the train does not need to be equipped with two sets of equipment to deal with the interruption caused by handover.

[0060] The train travels from bottom to top, and adopts the method of the present invention to exper...

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Abstract

The invention discloses a transmission method and system for CBTB vehicle-ground data with distributed fountain codes. The system comprises components such as a ground-distributed fountain code coding and decoding device and a vehicle onboard fountain code coding and decoding device, the ground-distributed fountain code coding and decoding device not only can transmit data to an optical fiber backbone network after coding the data of a CBTC control center, but also can lead data packets from the optical fiber backbone network to be subjected to virtual trunking and decode the data packets, and transmit recovered data after the decoding to the CBTC control center; the vehicle onboard fountain code coding and decoding device can not only lead data packets received from vehicle onboard transceiver antennas to be subjected to virtual trunking and decoding, and transmit the recovered data after the decoding to a VOBC (Vehicle Onboard Controller), but also can send the data transmitted by the VOBC through the vehicle onboard transceiver antennas of the head and the rear of a vehicle after coding the data. The transmission method and system for CBTB vehicle-ground data with the distributed fountain codes can be used for vehicle-ground data transmission and overcomes the defects of CBTC handoff interrupt, low equipment utilization rate and needing at least one line of complete data during a decoding process.

Description

technical field [0001] The invention relates to the technical field of data communication, in particular to a CBTC data sending and receiving method and system using distributed fountain codes. Background technique [0002] In modern rail transit systems, Communication-Based Train Control (CBTC) has become a research hotspot in the field of vehicle-ground communication. CBTC is capable of two-way, continuous, and large-capacity data transmission between high-speed trains and the ground. [0003] CBTC shortens the operation interval through moving block technology, improves the operation efficiency of trains and the flexibility of the system. In the CBTC system, the vehicle onboard controller (Vehicle Onboard Controller, VOBC) actively measures and locates the train, and sends the location information to the trackside zone controller (Zone Controller, ZC) through a wireless channel. ZC is responsible for tracking all the trains on the line and calculating the Movement Autho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00B61L27/00
Inventor 李光磊侯晓彬蒋大明冯锡生
Owner BEIJING JIAODA MICROUNION TECH
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